• Principal Skinner as The Cat in the Hat
  • Grandpa Abe as Mack the Turtle
  • Milhouse Van Houten as Horton the Elephant
  • Superintendent Chalmers as Joey
  • Groundskeeper Willy as Norval the Fish
  • Barney Gumble as Sam-I-Am
  • Kent Brockman as Mr. Brown
  • Ned Flanders as The Lorax
  • Rod Flanders as Mr. Knox
  • Todd Flanders as Fox in Socks
  • Mr. Smithers as Conrad
  • Sideshow Bob as The Grinch
  • Lenny as Thing One
  • Carl as Thing Two
  • Rainer Wolfcastle as Thidwick the Big-Hearted Moose
  • Agnes Skinner as Jane Kangaroo
  • Maude Flanders as Pam-I-Am
  • Martin Prince as Mack
  • Edna Krabappel as Sarah Hall-Small
  • Yes Guy as Little Cat Fleep
  • Ralph Wiggum as Little Cat D
  • Kearney as North-Going Zax
  • Dolph as South-Going Zax
  • Chief Wiggum as Terrence McBird
  • and more

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